Taper-finishing machine.



W. W. DOOLITTLE. TAPE-RV-FINISHING MACHINE.

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W. W. DOOLITTLE. TAPER FINISHING MACHINE. APPLICATION FILED Ann. 1916.

Patented Apr. 24,1917.

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lllll/w ,llllllll/llll fizu W2; 27.22am k 2 UNITED STATES PATENT OFFICE.

WILLIAM W. DOOLITTLE, OF CHICAGO, ILLINOIS, ASSIGNOR TO CRANE COMPANY,OF

CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

[PAPER-FINISHING MACHINE.

Specification of Letters Patent.

I Patented Apr. 24, 191 7.

2 all whom it may concern:

Be it known that I, WILLIAM W. Doonrr- TLE, a citizen of the UnitedStates, residing at Chicago, in the county of Cook and State ofIllinois, have invented Certain new and useful Improvements inTaper-Finishing Machines of which the followin is a full, clear, andexact specification, re erence being had to the accompanying drawings,forming a part hereof.

My invention has reference to improve-. ments in that class of machineswherein ,metallic cast bodies are subjected to the action of cuttingtools for taper finishing cylindrical portions of the same; and it hasfor its principal objects to provide a machine capablev of taperfinishing such portions, as for example the taper holes of cock bodies,with a minimum expenditure of power and a reduction in wear and tearuponcutting tools and operating parts.

My invention also contemplates the proa vision of such a machine whereina cheaper class of tool may be employed than heretofore used, and with agreater facility in getting under the scale of the casting, that is'tosay, instead of using the customary taper reaming tools for the purposeof finishing the cored taper hole of the casting to the required finishdiameter I provide in the machine a series of relatively cheaperstraight drills of gradually decreasing diameters arranged withreference to the work to make cuts through the scale in successive lowerhorizontal planes leaving a series ofsuperposed steps of the stock insuch a projecting relation as to be easily ound down to the desiredfinish diamete'r y the employment of a suitable reaming tool.

My invention further contemplates :certain novel details ofconstruction, combination and arrangement of parts of the im provedmachine, with the purpose of improving the construction, and to mcreasethe efficiency and utility of machines of this character.

These, together with such other ob ects as may hereinafter appear, orare incident to my invention, I obtain by means of theconstructionillustrated in preferred form in the accompanying drawings, whereinFigures 1 and 2 represent front and side elevations, respectively of themachine embodying my invention;

Fig. 3 is a vertical sectional view taken through the work table andspindle-carrier along the line 33 of Fig. 5;

Fig. 4 represents a topplan view of the table and a horizontal sectiontaken through the side frame supports on the line 44 of Fig. 1;

Fig. 5 is a similar view taken above the spmdle carrier on the line 5-5of Fig. 1;

Fig. 6 is a side elevation of the table taken at the left of Fig. l asindicated therein by the line 6-6;

Figs. 7 and 8 are enlarged detailed views in perspective of certainlever operating mechanism hereinafter referred to; and

Fig. 9 represents an enlarged sectional .view of a cock bodyillustrating the cuts made by the straight drills in the casting.

Referring to the drawings, the numeral 1 indicates the base of themachine, and 2, 3, the hollow side frame standards mounted on the basecross connected by top frame members 45 and a spindle carrier or drillframe 6. Immediately below this drill frame is a work table 7 providedwith a guide plunger 8 mounted in a cylindrical standard 9 for relativevertical and rotative 'movement, the guide plunger havin a lesserdiameter than the table and depending therefrom into the standard 9which is secured upon the base 1.

Both the work table and the drill frame are axially in alinement; thelatter having formed about its axis a hollow hub 10 whose outer faceconstitutes a bearing for the combined bevel and spur gear 11, whichlatter is maintained in relation with the hub by the collar 12 and setscrew 13, as in the manner shown in Fig. 3.' Meshing with the spur teeth11 of the gear 11 are pinions 14 mounted on the upper ends of spindles15 which in turn are carried in bearings 16 formed in the drill frame atpoints radially of the drill frame axis. Below the bearings are thecustomary drill couplings or clutches 17 for maintaining the drills Aand reamers B in the sockets of their respective spindles.

Mounted on the outer face of the frame standard 3 is a bearing bracket18 and an innerbearing 18 for the main shaft 19, which latter pinions 21and 22, the cone pulley being connected with any suitable source-ofpower carries the cone pulley 20 and table is the to impart rotativemovement to the train of gearing shown. Supported in bearings 23, 23, isa shaft 24 having a gear 51 operatively meshing with the pinion 21 onshaft 19 and a bevel pinion 26 at its inner end engaging the bevel teeth11* .formed upon. the upper face of the gear 11 (Fig. 3). From thedescription thus far made it will be apparent that the gear 11 inreceiving rotative movement from the bevel pinion 26 in turn rt tatesthe spindles and cutting tools through their respective pinions 14.

Vertical openings 27 are formed in the table directly under and inalinement with the cutting tools A, B, and above each of these openlngsmay be rigidly mounted any preferred type ofclamp for holding the workin position, one clamp and its cock body only being shown, as indicatedrespectively by the numerals 28 and 29.

The cock body as cast has a taper hole 30 (Fig. 9) slightly less thanthe required finish diameter, and heretofore it has been customary tofinish ream the hole by the employment solely of taper reaming tools,which method involved a large expenditure of power, and furthermoreresults in excessive wear and tear upon an expensive class of tool,particularly in evidence when ini 'tiallycutting through the scale ofthe castiiiy invention more particularly resides in providing a group ofstraight (1113s A of graduall decreasing diameter, an whose cutting acesas the diameters decrease from the initial drill A to the last drill A?depend from the drill frame in successively lower planes toward thetable, so that a cock body will receive successive cuts from successivedrills in different planes before the reamers are reached. Nine of thesestraight drills A and three roughing and finishing reamers B are shown,but any other suitable number may be employed as may be desired for theparticular work in hand.

The drill press 6 and work table 7 are relatively movable in verticaland horizontal planes, and in the embodiment shown, the movable memberas has already been indicated indescribing its relation with thecylindrical standard 9. Means are provided to bring the work up to thetools for the drilling operation comprising a rod 31 extendingvertically through the bear ng 10, its lower end 31 being associatedwith the table" and its upper end provided witlli da yoke 32, the latterhaving a roller 32f ably engaging a lifting cam 33 whlch is carried bythe cam shaft 34. A supplementary raising and lowering means may beadvantageously employed in the form of a weight device 35 which in thepresent instance is located within the hollow standard 2 and connectedwith the yoke 32 by the flexible connection 25 carried on rollers 36,36.

ally lowering planes.

ing

The table is in its lowered position when the cam 33 occupies theposition taken in Fig. 2, the cam havin complementary raising andlowering side aces a and b and an intermediate face 0 containing thehigh point of the cam. This face 0 when enga d .by the roller 32' onleaving the lifting ace a maintains "the work operatively in relationwith the rotating tools to complete the cuts until the face I) isreached, whereupon the work is released, the descent of the table beingcontrolled by the weight 35. A locking clutch 49 is secured to the innerface of the standard 2 tolock the table when the latter is raised to itsoperative position.

A ball bearing device 37 (Fig. 3) provides a convenient form ofconnection between the rod 31 and the table, permitting intermittentrotation of the table so that as each drill finishes its out in itscorresponding cock body the table is lowered and given movement on anarc to bring that articular cock body under the next succeeding andsmaller diametered drill, to which it is raised by the table in order toreceive an additional cut in a lower plane than the last cut taken. Itwill be apparent that all of the cock bodies on the table are thusbrought. successively in a step-by-step or intermittent movement underdrills of gradually decreasing diameter which, as already stated,correspondin ly depend to have their cuttin faces in gradu- In ot erwords a cock body inserted on the table at the point m is successivelysubjected to the cutting action 10 of each of the tools until it isreleased from the last reamer where it is taken out as a finishedproduct, in so far as the purpose of this mac line is concerne andanother cock body large diametered portion of its taper hole. toward thedrill frame in readiness to bebrought under the first drill A.

Means are also provided for automatically imparting this intermittentrevolution to the 11d table, and with this end in view the table isperipherally formed with a series of out-- wardly projecting lugs 46spaced apart in relation to the travel of the work from tool to tool inthe progression of the table. flanged ring 44 isposed about the tableplunger 8 rests upon the cupseat 9 formed in the upper terminal portionof the cylindrical standard 9, and is provided with an indexing arm 45extending outwardly in an 120 horizontal plane toward the table rim.This arm is terminally formed with an upstandclutch 47 conformed toreceive and hold one of the lugs when the table is lowered,

and is adapted to impart such movement to 125 the table as to bring thatparticular lug immediately below the locking clutch 49 and with which itengages when the table is raised to its operative position. As the lugis thereupon inserted at a: with the 46 clears the indexing arm clutch47 the arm l jthe interposition of a link 48 port 50 and whoseupper arm43 is suitably connected with the indexing arm 45' throug capable ofslight lateral play (Fig. 7). The numeral 40 indicates a lever mountedin the upper frame member 4, 41 arod pivotally connecting the outer endof the lever 40 with the lower arm 42 of the bell crank lever, and

37 a table turning or indexing cam 38 -mounted on the cam shaft 34 andformed indicated at 1' in Fi raising releases from the clutch 47 with away 39 in. which thestud 40 of the lever 40 has movement to rock thebell crank lever and ultimately actuate the indexing arm 45. When thelever stud 40 occupies the position taken in Fig.. 2, as more clearly10, the indexing arm is in its retracte position and starts to turn thetable until the ,point 8 is reached. At this point the arm is in. itsadvanced position and the table stops turning, and in and registers withthe lock clutch 49, which serves to maintain the table against rotationwhen the tools are taking their cuts. During the travel of the stud 40between the points t and w the indexing arm 45 is retracted, and

engages the next lug 46 during the movement of the stud between thepoint w and r as the table is lowered, a finished cock bodybeing thenremoved from the machine and another one inserted at the point a, whichtogether with the Work still on the table are moved under the nextadjacent tools. v

The cam shaft 34 rotates in bearings 52, 52, and receives its rotationthrough the gears 53,54, and 56, the latter being mounted on theintermediate shaft 24.

Counter-boring drills are also provided to finish face and counterborethe lower face of the cock body, and are carried in bracket. ,bearings57 mounted on the. cylindrical standard 9. Each drill comprises the.toolC and its spindle 58, the latter being splined in the sleeve 59'which isflanged over the upper edge of the bearin 57 to form a stop seat 59' andis provide at its lower end With a pinion 60 abutting'the lower edgeof-the bearing. In this way, the'sleeve is held a ainst any verticalmovement which might be communicated to it by the spindle in its upwardmovement toward the work.

Rotation is imparted to the sleeves and spindles by the gearing 60, 61,62, 63, 64 and 65, the latter mcshin power shaft 19, igs. 1 and Thelower ends of the splndles fit in a double seated casting 66 providedwith a bearing 66 for the pivot pin 67 which is carried in the outer endof a lifting lever 67.

with the gear 22 on the The latter has connected with it a lifting rod68 and its inner end is fulcrulned to the base 1 through the interosition of a swinging link 69.

- tive movement therewith to lift the coun terboring tools to the work.

Theinitial diameter of the taper hole of the cock body -is representedby the dotted line m, Fig. 9, and the full line n the desired diameter.vWith the parts positioned and operating as already described, the cockbod is first inserted into its clamp at the feet; point :12, and the,table automatically turns to bring the body under the first straightdrill A and rises into its locked operative position. This drillthereupon takes the first cut a through the scale of the casting along avertical line p that extends diagonally of the lines m and 12. leaving astep 9 and a shoulder u, the depth of the cut a being determined by theconformation of the face 0 of the table lifting cam33. The cock body,after being lowered, turned, and raised, is then subjected to thecutting action of the succeeding drill A and the next cut a is made bywhich the shoulder at merges into the second step .9 and at the sametime another/cock body is receiving its first cut from the first drill.Since the cutting face of the second drill is of slightly decreaseddiameter and depends in a lower plane than that of the first drill, andso on to the last drill A, it will be apparent that the successiv'ecutswhen taken leave a series of superposed steps projecting into thehole'of the casting. As each cock body leaves the last drill itencounters the reamers B, of

' which one or more may be used as desired,

casting, such as the taper and outer face of acock, are desired to befinished, shell or hollow straight drills and shell reamers may besubstituted for those illustrated in the present instance.

From the foregoing description the essential features, elements andoperation of the machine, together with the advantages thereof 'will beclearly apparent to those skilled in the art.

I do not intend to restrict myself to the exact details of constructionor to the precise arrangement of the various parts, as

shown, as it is manifest that variations and modifications may be madeinthe features of construction and arrangement without departing from thespirit and scope of my invention and improvements. I therefore reservethe right to all such variations and modifications as properly fallwithin the scope of my invention and the terms of the following claims.

Having thus described my invention and illustrated its use, what I claimas new and desire to secure by Letters Patent, is the following 1. In amachine of the character described, and in combination, a drill frameand a work support located with reference to each other and relativelymovable, a plurality of straight drills in said frame of differentdiameters constructed and arranged for taking successive cuts in thework in differing depths, whereby to leave steps of uncut stock in eachof the cuts, and a taper finishing device for reaming the uncut stock tothe desired finish diameter.

2. In a machine of the character described, and in combination, a drillframe and a work support operatively disposed for relative rotative andreciprocative movement, means for taper finishing tapered cylindricalportions of the work including a series of differently diametered drillsrotatively carried in said frame and constructed and arranged withreference to said support for successively taking progressive cuts inrelatively differing. depths in said cylindrical portions, whereby toleave superposed annular steps of uncut stock projecting beyond theplane of the desired finish diameter, means for simultaneously rotatingsaid drills, means for imparting relative, movement to said table, andmeans for dressing down said steps to the desired finish diameter.

3. In a machine of the character described,

the combination of a drill frame and a work support located withreference to. each other and relatively movable in horizontal andvertical planes, and means for taper finishing tapered cylindricalportions of the work comprising a plurality of straight drills and oneor more taper reamers rotatively carried in said drill frame andconstructed and arranged respectively with relation to said table andthe work for taking successive vertical cuts at different horizontaldepths in said tapered cylindricalportions andfor reaming the remaininguncut portions of stock to the finish taper diameter.

4. In a machine of the character described, the combination of a mainframe, a drill frame therein and a movable work support located withreference thereto, a group of drills rotatably carried in said drillframe, and to the cutting action of which the work is successively andsimultaneously subjected when positioned on the table, said drills ofspindles therein, a work table disposed with reference thereto, saidtable and frame being relatively movable, and means for successivelytaking cuts on cylindrical tapered portions of the work, comprisingdrills in said spindles presenting straight cutting faces of graduallydiminishing diameters to the work and in eschelon with reference to saidtable.

6. In a machine of the character described, the combination of a drillframe, spindles rotatively carried therein, drills in said spindles, awork table provided with a support and formed with a series of lockingportions, means for advancing said table to locked operative positionand retracting the same from the drills, and means for impartingintermittent rotary movement on successive arcs in a horizontal plane tosaid table including an indexing member carried on said support, andadapted to successively enga e said locking portions whereby tooperative y position said table when in unlocked position.

7. In a machine of the'character described, the combination of a drillframe, a relatively movable work turntable below said table, means forimparting movement to the table, in a vertical lane toward and from the.drill frame,.a ock device adapted to be'engaged by said table when inraised position, spindles in said frame, gearing for rotating saidspindles, means for impartin intero mittent turning movement to the talo, and drills in said spindles to the cutting action of which the workis successively subjected, said drills presenting cutting faces ofrelatively diflerent diameters disposed in differ- 5 ent horizontaldepths, and actuating mechanism for said means, said table beingsuccessively lowered from, turned, and raised to locked operativeposition in the actuation of said mechanism.

8. In combination, a relatively movable drill frame and a work supportoperatively disposed with reference to each other, a group of drillsconstructed and arranged in said frame for successively andprogressively taking straight cuts on different cylindrical taperedportions of the work, whereby to leave superposed steps of uncut stockprojecting from said portions, means for dressing down said steps to thedesired .table is successively retracted the work, and means forrotating said drills.

9. In a machine of the character described, the combination of a frame,a series of rotary drills, a movable work table disposed With referencethereto and adapted to receive the work in a series,'a horizontal rotaryshaft mounted in said frame independently of the table, means foroperatively advancing and retracting said table relatively of thedrills, means for imparting intermittent rotary movement to said'table,both said means having separate operative connections to the table andincluding actuating cam devices ranged onsaid rotary shaftsimultaneously whereby said from, turned, and raised to the drillsduring rotary movement of said shaft.

10. In a machine of the character de scribed, the combination of a worktable adapted toreceive and hold a series of articles and havlngperipheral locking portions, a main frame having a fixed integralsupport for said table and a drill frame, drills for said drill frame,said table being capable of being advanced and retracted on its supportwith reference to said drills, a locking device on said main frameadapted to lock with one of said locking portions when the table isadvanced, and an indexing arm carried-by said support and adapted toengage with another of said locking portions when the table isretracted.

11. In a machine of the character dc scribed, the combination of-a worktable adapted to receive and hold a series of articles and havingperipheral locking portions, a main frame having ,a fixed integralsupport for said table and a drill frame, drills-for said drill frame,said table being capable of being advanced and-retracted on its supportwith reference to said drills, a locking device on said main frameadapted to lock with one of said locking portions when the table isadvanced, an indexing arm carried by said support and adapted to engagewith another of said locking portions when the table is retracted, andactuating means for said indexing arm.'

12. In a machine of the character de scribed, the combination of arelatively,

movable frame and a work support constructed to receive and hold thework in a serial relation, means for progressively taper 'finish'ingtapered cylindrical portions of the work comprising a group of straightdrilling and taper finishing tools rotatively carried in said frame andconstructed and arranged with reference to said table and the work fortaking'successive cuts in reladrilling and taper constructed and ar ingan indexing member rev mounted in said frame I will tively differenthorizontal depths in Said, portions and for dressing down the remaininguncut portions of the in said pop tions to the finish taper diameter ofthe work, and means for simultaneously rotate ing said tools.

13. In a machine of the, character de; scribed, the combination of amovable frame and a work structed to receive and hold. the work in aserial relation, means for p 21-;- e! Iy taper finishingtaperedcylindricali of the Work comprising a, group of r carried in saidframe-and arranged with reference the Work for taking successive matsrelatively different horizontal depths in Said portions and for dressingdo the mg uncut portions of the stock in said portions to the finishtaper of the, work, means for simnltanecmslly rotating" said tools, anda coiperative for facing the work;

14. The combinatigm of a work table luving peripheral locking lugs, amain finlme provided with a lug sllidenway', a v support in said framefor time table, the table capable of reciprocatim ind movementrelatively of its support slideway adapted to receive one of saidlugsupon reciprocation of the table in me direction, and means for w a;in; tent rotary movement to said table (tax-tn 3 by sald support andformed withi, a slide way adapted to receive a "1n up reciprocation ofthe table in the .1; a r rection, and actuating opera, tively associatedin said frame for a said indexing member to bring i the lugs-in positionwith a, first mentioned slideway. I

15. In a machine of the clam a the combination of a main frame standardsand a ppqrt, a drill and a gear for rotating said a l-.. table in saidsupport, a main power shaft in said main frame, a eountmshaft in saidstandards and provided with mm; for imparting relative recipmcalimmovement to the drill frame and aid 'hbh Ind for indexing (tihe latterin phase with said movement, an a gear operated by said power sh liitand and arranged for simultan a said .gear and said oouniel'slufi.

In testimony whereof I have signed my name.

W. DOOLITTLE III

